<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" href="./style.css">
    <!-- ./表示当前文件夹 -->
</head>
<body>
    <div class="wrapper">
        <!-- 视频标签 control视频播放按钮-->
        <video class="flex" src="http://media.w3.org/2010/05/sintel/trailer.mp4" controls></video>
        <!-- 滑块 -->
         <div class="speed">
            <div class="speed-bar">1x</div>
         </div>
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</body>
</html>